Some observations on the diet of the backswimmer, Anisops wakefieldi (Hemiptera: Notonectidae)

摘要: In a series of laboratory experiments, A. wakefieldi was presented with variety prey from different systems to investigate its potential for cannibalism and eating cladocerans, copepods rotifers. Large (ca. 7 mm) Anisops decreased the survivorship small 3 Anisops, but ate only 0.1 individual predator-1 d-1. Ingestion rates on (<0.5 large (0.5–0.9 Ceriodaphnia dubia were 53 28 individuals d-1, while those these about twice as high. Clearance showed that C. similar efficiencies, much more efficiently. efficiently than calanoid copepod Boeckella hamata. Only adult B. had very low ingestion rate (0.6 d-1) larger congener, triarticulata. Small, not large, rotifer Synchaeta pectinata natural assemblage rotifers S. Polyarthra dolichoptera, four other species well-developed lorica – Anuraeopsis fissa, Brachionus angularis, Keratella cochlearis K. slacki. 14–20 Anisops -1